The handles are easy to mopntieren, appropriate templates for the laying of levers and other switches are included. Only the reference to 6 Nm to tighten the screw at the beginning prepare a few headaches. A corresponding torque wrench is not available in every household and would have for about 40, - to be purchased separately. I was lucky and someone in the circle.
Now I look forward to fall asleep that my hands much later and less strongly. The built-in handle cork is ground off but after several trips and we see clear signs of use on the handles.